Mercurial > hg > graal-jvmci-8

annotate graal/com.oracle.graal.word/src/com/oracle/graal/word/phases/WordTypeRewriterPhase.java @ 8506:c3657d00e343

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
-Merge with tip
author Christos Kotselidis <christos.kotselidis@oracle.com>
date Thu, 21 Mar 2013 14:11:13 +0100
parents 86b4965f0c9a 0db1cb049a78
children c92949b1ec8a
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.word.phases;
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24
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25 import java.lang.reflect.*;
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26
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27 import com.oracle.graal.api.meta.*;
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28 import com.oracle.graal.graph.*;
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29 import com.oracle.graal.nodes.*;
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30 import com.oracle.graal.nodes.calc.*;
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31 import com.oracle.graal.nodes.extended.*;
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32 import com.oracle.graal.nodes.java.*;
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33 import com.oracle.graal.nodes.type.*;
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34 import com.oracle.graal.nodes.util.*;
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35 import com.oracle.graal.phases.*;
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36 import com.oracle.graal.phases.util.*;
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37 import com.oracle.graal.word.*;
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38 import com.oracle.graal.word.Word.Operation;
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39
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40 /**
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41 * Transforms all uses of the {@link Word} class into unsigned operations on {@code int} or
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42 * {@code long} values, depending on the word kind of the underlying platform.
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43 */
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44 public class WordTypeRewriterPhase extends Phase {
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45
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46 private final ResolvedJavaType wordBaseType;
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47 private final ResolvedJavaType wordImplType;
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48 private final Kind wordKind;
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49
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50 public WordTypeRewriterPhase(MetaAccessProvider metaAccess, Kind wordKind) {
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51 this.wordKind = wordKind;
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52 this.wordBaseType = metaAccess.lookupJavaType(WordBase.class);
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53 this.wordImplType = metaAccess.lookupJavaType(Word.class);
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54 }
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55
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56 public ResolvedJavaType getWordBaseType() {
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57 return wordBaseType;
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58 }
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59
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60 public ResolvedJavaType getWordImplType() {
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61 return wordImplType;
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62 }
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63
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64 @Override
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65 protected void run(StructuredGraph graph) {
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66 for (Node n : GraphOrder.forwardGraph(graph)) {
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67 if (n instanceof ValueNode) {
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68 ValueNode valueNode = (ValueNode) n;
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69 if (isWord(valueNode)) {
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70 changeToWord(valueNode);
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71 }
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72 }
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73 }
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74
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75 // Remove casts between different word types (which are by now no longer have kind Object)
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76 for (CheckCastNode checkCastNode : graph.getNodes().filter(CheckCastNode.class).snapshot()) {
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77 if (!checkCastNode.isDeleted() && checkCastNode.kind() == wordKind) {
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78 checkCastNode.replaceAtUsages(checkCastNode.object());
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79 graph.removeFixed(checkCastNode);
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80 }
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81 }
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82
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83 // Remove unnecessary/redundant unsafe casts
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84 for (UnsafeCastNode unsafeCastNode : graph.getNodes().filter(UnsafeCastNode.class).snapshot()) {
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85 if (!unsafeCastNode.isDeleted() && unsafeCastNode.object().stamp() == unsafeCastNode.stamp()) {
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86 graph.replaceFloating(unsafeCastNode, unsafeCastNode.object());
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87 }
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88 }
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89
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90 // Replace ObjectEqualsNodes with IntegerEqualsNodes where the values being compared are
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91 // words
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92 for (ObjectEqualsNode objectEqualsNode : graph.getNodes().filter(ObjectEqualsNode.class).snapshot()) {
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93 ValueNode x = objectEqualsNode.x();
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94 ValueNode y = objectEqualsNode.y();
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95 if (x.kind() == wordKind || y.kind() == wordKind) {
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96 assert x.kind() == wordKind;
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97 assert y.kind() == wordKind;
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98
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99 // TODO Remove the whole iteration of ObjectEqualsNodes when we are sure that there
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100 // is no more code where this triggers.
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101 throw GraalInternalError.shouldNotReachHere("Comparison of words with == and != is no longer supported");
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102 }
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103 }
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104
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105 for (LoadIndexedNode load : graph.getNodes().filter(LoadIndexedNode.class).snapshot()) {
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106 if (isWord(load)) {
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107 load.setStamp(StampFactory.forKind(wordKind));
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108 }
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109 }
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110
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111 for (MethodCallTargetNode callTargetNode : graph.getNodes(MethodCallTargetNode.class).snapshot()) {
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112 ResolvedJavaMethod targetMethod = callTargetNode.targetMethod();
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113 if (!callTargetNode.isStatic() && (callTargetNode.receiver().kind() == wordKind || isWord(callTargetNode.receiver()))) {
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114 targetMethod = getWordImplType().resolveMethod(targetMethod);
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115 }
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116 Operation operation = targetMethod.getAnnotation(Word.Operation.class);
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117 if (operation != null) {
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118 NodeInputList<ValueNode> arguments = callTargetNode.arguments();
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119 Invoke invoke = (Invoke) callTargetNode.usages().first();
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120 assert invoke != null : callTargetNode.targetMethod();
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121
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122 switch (operation.opcode()) {
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123 case NODE_CLASS:
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124 assert arguments.size() == 2;
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125 ValueNode left = arguments.get(0);
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126 ValueNode right = operation.rightOperandIsInt() ? toUnsigned(graph, arguments.get(1), Kind.Int) : fromSigned(graph, arguments.get(1));
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127 replace(invoke, nodeClassOp(graph, operation.node(), left, right, invoke));
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128 break;
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129
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130 case COMPARISON:
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131 assert arguments.size() == 2;
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132 replace(invoke, comparisonOp(graph, operation.condition(), arguments.get(0), fromSigned(graph, arguments.get(1))));
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133 break;
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134
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135 case NOT:
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136 assert arguments.size() == 1;
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137 replace(invoke, graph.unique(new XorNode(wordKind, arguments.get(0), ConstantNode.forIntegerKind(wordKind, -1, graph))));
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138 break;
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139
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140 case READ:
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141 assert arguments.size() == 2 || arguments.size() == 3;
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142 Kind readKind = asKind(callTargetNode.returnType());
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143 Object readLocation = arguments.size() == 2 ? LocationNode.UNKNOWN_LOCATION : arguments.get(2).asConstant().asObject();
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144 replace(invoke, readOp(graph, arguments.get(0), arguments.get(1), invoke, readKind, readLocation));
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
145 break;
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parents:
diff changeset
146
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
147 case WRITE:
7904
c8f2002d2194 reintroduce default Word read/write operations, more tests
Lukas Stadler <lukas.stadler@jku.at>
parents: 7903
diff changeset
148 assert arguments.size() == 3 || arguments.size() == 4;
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1aca91e4333d fix Word.readByte/writeByte/readShort/writeShort/readChar/writeChar
Lukas Stadler <lukas.stadler@jku.at>
parents: 7868
diff changeset
149 Kind writeKind = asKind(targetMethod.getSignature().getParameterType(1, targetMethod.getDeclaringClass()));
7904
c8f2002d2194 reintroduce default Word read/write operations, more tests
Lukas Stadler <lukas.stadler@jku.at>
parents: 7903
diff changeset
150 Object writeLocation = arguments.size() == 3 ? LocationNode.ANY_LOCATION : arguments.get(3).asConstant().asObject();
c8f2002d2194 reintroduce default Word read/write operations, more tests
Lukas Stadler <lukas.stadler@jku.at>
parents: 7903
diff changeset
151 replace(invoke, writeOp(graph, arguments.get(0), arguments.get(1), arguments.get(2), invoke, writeKind, writeLocation));
7300
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parents:
diff changeset
152 break;
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parents:
diff changeset
153
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
154 case ZERO:
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
155 assert arguments.size() == 0;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
156 replace(invoke, ConstantNode.forIntegerKind(wordKind, 0L, graph));
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
157 break;
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parents:
diff changeset
158
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
159 case FROM_UNSIGNED:
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
160 assert arguments.size() == 1;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
161 replace(invoke, fromUnsigned(graph, arguments.get(0)));
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
162 break;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
163
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
164 case FROM_SIGNED:
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
165 assert arguments.size() == 1;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
166 replace(invoke, fromSigned(graph, arguments.get(0)));
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
167 break;
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parents:
diff changeset
168
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
169 case TO_RAW_VALUE:
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
170 assert arguments.size() == 1;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
171 replace(invoke, toUnsigned(graph, arguments.get(0), Kind.Long));
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
172 break;
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parents:
diff changeset
173
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
174 case FROM_OBJECT:
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
175 assert arguments.size() == 1;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
176 replace(invoke, graph.unique(new UnsafeCastNode(arguments.get(0), StampFactory.forKind(wordKind))));
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
177 break;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
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178
8492
286a49d423c9 -Snippetization of CMS WriteBarriers
Christos Kotselidis <christos.kotselidis@oracle.com>
parents: 7724
diff changeset
179 case FROM_ARRAY:
286a49d423c9 -Snippetization of CMS WriteBarriers
Christos Kotselidis <christos.kotselidis@oracle.com>
parents: 7724
diff changeset
180 assert arguments.size() == 2;
8493
9412b1915547 -More G1 WB Integration-Addition of GenerateLEANode for G1 previous value equalities
Christos Kotselidis <christos.kotselidis@oracle.com>
parents: 8492
diff changeset
181 replace(invoke, graph.unique(new GenerateLEANode(arguments.get(0), arguments.get(1), StampFactory.forKind(wordKind))));
8492
286a49d423c9 -Snippetization of CMS WriteBarriers
Christos Kotselidis <christos.kotselidis@oracle.com>
parents: 7724
diff changeset
182 break;
286a49d423c9 -Snippetization of CMS WriteBarriers
Christos Kotselidis <christos.kotselidis@oracle.com>
parents: 7724
diff changeset
183
7300
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parents:
diff changeset
184 case TO_OBJECT:
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
185 assert arguments.size() == 1;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
186 replace(invoke, graph.unique(new UnsafeCastNode(arguments.get(0), invoke.node().stamp())));
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parents:
diff changeset
187 break;
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parents:
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188
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parents:
diff changeset
189 default:
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parents:
diff changeset
190 throw new GraalInternalError("Unknown opcode: %s", operation.opcode());
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
191 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
192 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
193 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
194 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
195
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
196 private ValueNode fromUnsigned(StructuredGraph graph, ValueNode value) {
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parents:
diff changeset
197 return convert(graph, value, wordKind, ConvertNode.Op.L2I, ConvertNode.Op.UNSIGNED_I2L);
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parents:
diff changeset
198 }
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parents:
diff changeset
199
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parents:
diff changeset
200 private ValueNode fromSigned(StructuredGraph graph, ValueNode value) {
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parents:
diff changeset
201 return convert(graph, value, wordKind, ConvertNode.Op.L2I, ConvertNode.Op.I2L);
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parents:
diff changeset
202 }
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parents:
diff changeset
203
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
204 private static ValueNode toUnsigned(StructuredGraph graph, ValueNode value, Kind toKind) {
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parents:
diff changeset
205 return convert(graph, value, toKind, ConvertNode.Op.L2I, ConvertNode.Op.UNSIGNED_I2L);
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parents:
diff changeset
206 }
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parents:
diff changeset
207
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
208 private static ValueNode convert(StructuredGraph graph, ValueNode value, Kind toKind, ConvertNode.Op longToIntOp, ConvertNode.Op intToLongOp) {
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parents:
diff changeset
209 assert longToIntOp.from == Kind.Long && longToIntOp.to == Kind.Int;
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parents:
diff changeset
210 assert intToLongOp.from == Kind.Int && intToLongOp.to == Kind.Long;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
211 if (value.kind() == toKind) {
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
212 return value;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
213 }
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parents:
diff changeset
214
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
215 if (toKind == Kind.Int) {
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
216 assert value.kind() == Kind.Long;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
217 return graph.unique(new ConvertNode(longToIntOp, value));
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
218 } else {
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
219 assert toKind == Kind.Long;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
220 assert value.kind().getStackKind() == Kind.Int;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
221 return graph.unique(new ConvertNode(intToLongOp, value));
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
222 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
223 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
224
7305
cd205ca515dd Make integer division and remainder nodes fixed so that they can be lowered via snippets to do exception checks
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7302
diff changeset
225 private ValueNode nodeClassOp(StructuredGraph graph, Class<? extends ValueNode> nodeClass, ValueNode left, ValueNode right, Invoke invoke) {
7300
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parents:
diff changeset
226 try {
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 7305
diff changeset
227 Constructor<? extends ValueNode> constructor = nodeClass.getConstructor(Kind.class, ValueNode.class, ValueNode.class);
7305
cd205ca515dd Make integer division and remainder nodes fixed so that they can be lowered via snippets to do exception checks
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parents: 7302
diff changeset
228 ValueNode result = graph.add(constructor.newInstance(wordKind, left, right));
cd205ca515dd Make integer division and remainder nodes fixed so that they can be lowered via snippets to do exception checks
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7302
diff changeset
229 if (result instanceof FixedWithNextNode) {
cd205ca515dd Make integer division and remainder nodes fixed so that they can be lowered via snippets to do exception checks
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7302
diff changeset
230 graph.addBeforeFixed(invoke.node(), (FixedWithNextNode) result);
cd205ca515dd Make integer division and remainder nodes fixed so that they can be lowered via snippets to do exception checks
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parents: 7302
diff changeset
231 }
cd205ca515dd Make integer division and remainder nodes fixed so that they can be lowered via snippets to do exception checks
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parents: 7302
diff changeset
232 return result;
7300
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parents:
diff changeset
233 } catch (Throwable ex) {
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parents:
diff changeset
234 throw new GraalInternalError(ex).addContext(nodeClass.getName());
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
235 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
236 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
237
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parents:
diff changeset
238 private ValueNode comparisonOp(StructuredGraph graph, Condition condition, ValueNode left, ValueNode right) {
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parents:
diff changeset
239 assert left.kind() == wordKind && right.kind() == wordKind;
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parents:
diff changeset
240
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
241 // mirroring gets the condition into canonical form
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
242 boolean mirror = condition.canonicalMirror();
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
243
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
244 ValueNode a = mirror ? right : left;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
245 ValueNode b = mirror ? left : right;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
246
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
247 CompareNode comparison;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
248 if (condition == Condition.EQ || condition == Condition.NE) {
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
249 comparison = new IntegerEqualsNode(a, b);
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
250 } else if (condition.isUnsigned()) {
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
251 comparison = new IntegerBelowThanNode(a, b);
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
252 } else {
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
253 comparison = new IntegerLessThanNode(a, b);
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
254 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
255
8272
0db1cb049a78 Remove usage of negate() in word type rewriter phase.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7904
diff changeset
256 ConstantNode trueValue = ConstantNode.forInt(1, graph);
0db1cb049a78 Remove usage of negate() in word type rewriter phase.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7904
diff changeset
257 ConstantNode falseValue = ConstantNode.forInt(0, graph);
0db1cb049a78 Remove usage of negate() in word type rewriter phase.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7904
diff changeset
258
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parents:
diff changeset
259 if (condition.canonicalNegate()) {
8272
0db1cb049a78 Remove usage of negate() in word type rewriter phase.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7904
diff changeset
260 ConstantNode temp = trueValue;
0db1cb049a78 Remove usage of negate() in word type rewriter phase.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7904
diff changeset
261 trueValue = falseValue;
0db1cb049a78 Remove usage of negate() in word type rewriter phase.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7904
diff changeset
262 falseValue = temp;
7300
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parents:
diff changeset
263 }
8272
0db1cb049a78 Remove usage of negate() in word type rewriter phase.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7904
diff changeset
264 ConditionalNode materialize = graph.unique(new ConditionalNode(graph.unique(comparison), trueValue, falseValue));
0db1cb049a78 Remove usage of negate() in word type rewriter phase.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7904
diff changeset
265 return materialize;
7300
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parents:
diff changeset
266 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
267
7898
1aca91e4333d fix Word.readByte/writeByte/readShort/writeShort/readChar/writeChar
Lukas Stadler <lukas.stadler@jku.at>
parents: 7868
diff changeset
268 private static ValueNode readOp(StructuredGraph graph, ValueNode base, ValueNode offset, Invoke invoke, Kind readKind, Object locationIdentity) {
1aca91e4333d fix Word.readByte/writeByte/readShort/writeShort/readChar/writeChar
Lukas Stadler <lukas.stadler@jku.at>
parents: 7868
diff changeset
269 IndexedLocationNode location = IndexedLocationNode.create(locationIdentity, readKind, 0, offset, graph, 1);
7300
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parents:
diff changeset
270 ReadNode read = graph.add(new ReadNode(base, location, invoke.node().stamp()));
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parents:
diff changeset
271 graph.addBeforeFixed(invoke.node(), read);
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 7305
diff changeset
272 // The read must not float outside its block otherwise it may float above an explicit zero
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 7305
diff changeset
273 // check on its base address
7300
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parents:
diff changeset
274 read.dependencies().add(BeginNode.prevBegin(invoke.node()));
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parents:
diff changeset
275 return read;
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parents:
diff changeset
276 }
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parents:
diff changeset
277
7898
1aca91e4333d fix Word.readByte/writeByte/readShort/writeShort/readChar/writeChar
Lukas Stadler <lukas.stadler@jku.at>
parents: 7868
diff changeset
278 private static ValueNode writeOp(StructuredGraph graph, ValueNode base, ValueNode offset, ValueNode value, Invoke invoke, Kind writeKind, Object locationIdentity) {
1aca91e4333d fix Word.readByte/writeByte/readShort/writeShort/readChar/writeChar
Lukas Stadler <lukas.stadler@jku.at>
parents: 7868
diff changeset
279 IndexedLocationNode location = IndexedLocationNode.create(locationIdentity, writeKind, 0, offset, graph, 1);
7300
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parents:
diff changeset
280 WriteNode write = graph.add(new WriteNode(base, value, location));
7903
f19c4d447e73 more bug fixes and tests for Word read/write operations
Lukas Stadler <lukas.stadler@jku.at>
parents: 7898
diff changeset
281 write.setStateAfter(invoke.stateAfter());
7300
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parents:
diff changeset
282 graph.addBeforeFixed(invoke.node(), write);
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parents:
diff changeset
283 return write;
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
284 }
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
285
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
286 private static void replace(Invoke invoke, ValueNode value) {
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Christian Wimmer <christian.wimmer@oracle.com>
parents:
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287 FixedNode next = invoke.next();
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288 invoke.setNext(null);
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289 invoke.node().replaceAtPredecessor(next);
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290 invoke.node().replaceAtUsages(value);
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291 GraphUtil.killCFG(invoke.node());
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292 }
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293
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294 public boolean isWord(ValueNode node) {
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295 /*
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296 * If we already know that we have a word type, we do not need to infer the stamp. This
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297 * avoids exceptions in inferStamp when the inputs have already been rewritten to word,
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298 * i.e., when the expected input is no longer an object.
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299 */
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300 if (isWord0(node)) {
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301 return true;
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302 }
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303 node.inferStamp();
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304 return isWord0(node);
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305 }
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306
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307 private boolean isWord0(ValueNode node) {
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308 if (node.stamp() == StampFactory.forWord()) {
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309 return true;
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310 }
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311 if (node instanceof LoadIndexedNode) {
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312 ValueNode array = ((LoadIndexedNode) node).array();
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313 if (array.objectStamp().type() == null) {
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314 // There are cases where the array does not have a known type yet. Assume it is not
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315 // a word type.
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316 // TODO disallow LoadIndexedNode for word arrays?
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317 return false;
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318 }
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319 return isWord(array.objectStamp().type().getComponentType());
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320 }
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321 if (node.kind() == Kind.Object) {
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322 return isWord(node.objectStamp().type());
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323 }
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324 return false;
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325 }
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326
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327 public boolean isWord(ResolvedJavaType type) {
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328 if (type != null && wordBaseType.isAssignableFrom(type)) {
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329 return true;
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330 }
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331 return false;
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332 }
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333
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334 public Kind asKind(JavaType type) {
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335 if (type instanceof ResolvedJavaType) {
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336 return isWord((ResolvedJavaType) type) ? wordKind : type.getKind();
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337 } else {
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338 return Kind.Object;
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339 }
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340 }
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341
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342 private void changeToWord(ValueNode valueNode) {
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343 if (valueNode.isConstant() && valueNode.asConstant().getKind() == Kind.Object) {
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344 WordBase value = (WordBase) valueNode.asConstant().asObject();
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345 ConstantNode newConstant = ConstantNode.forIntegerKind(wordKind, value.rawValue(), valueNode.graph());
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346 ((StructuredGraph) valueNode.graph()).replaceFloating((ConstantNode) valueNode, newConstant);
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347 } else {
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348 assert !(valueNode instanceof ConstantNode) : "boxed Word constants should not appear in a snippet graph: " + valueNode + ", stamp: " + valueNode.stamp();
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349 valueNode.setStamp(StampFactory.forKind(wordKind));
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350 }
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351 }
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352 }